CePt$_{2}$In$_{7}$: Shubnikov-de Haas measurements on micro-structured samples under high pressures

CePt$_{2}$In$_{7}$ belongs to the Ce$_{m}$M$_{n}$In$_{3m+2n}$ heavy fermion family, but compared to the Ce$M$In$_{5}$ members of this group, exhibits a more two dimensional electronic structure. At zero pressure the ground state is antiferromagnetically ordered. Under pressure the antiferromagnetic order is suppressed and a superconducting phase is induced, with a maximum T$_{c}$ above a quantum critical point around 31 kbar. To investigate the changes in the Fermi Surface and effective electron masses around the quantum critical point, Shubnikov-de Haas measurements were conducted under high pressures in an anvil cell. The samples were micro-structured and contacted using a Focused Ion Beam (FIB). The Focused Ion Beam enables sample contacting and structuring down to a sub-micrometer scale, making the measurement of several samples with complex shapes and multiple contacts on a single anvil feasible.